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Synthesis and Properties of an Ecofriendly Superabsorbent Composite by Grafting the Poly(acrylic acid) onto the Surface of Dopamine-Coated Sea Buckthorn Branches Article Options
Xiaohui Xu† , Bo Bai *‡ , Chenxu Ding‡ , Honglun Wang‡ , and Yourui Suo‡ † College of Environmental Science and Engineering, Chang’an University, Xi’an 710054, People’s Republic of China ‡ Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, People’s Republic of China
Cite this: Ind. Eng. Chem. Res. 54, 13, 3268-3278
Ind. Eng. Chem. Res., 2015, 54 (13), pp 3268–3278 DOI: 10.1021/acs.iecr.5b00092 Publication Date (Web): March 16, 2015 Copyright © 2015 American Chemical Society *Tel.: +86 298 233 0952. Fax: +86 298 233 9961. E-mail:
[email protected].
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With the purpose of decreasing production costs and mitigating negative effects on the environment, an ecofriendly superabsorbent composite (SB@PDA/PAA) was synthesized by
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grafting poly(acrylic acid) onto the surface of dopamine-coated waste sea buckthorn branches. The structure of the obtained products was analyzed using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The effects of pH level, salt concentration, cation type, and reswelling time on water absorbency were examined further. The results showed that the swelling behaviors of the superabsorbent composite were highly
Xu, Xiaohui
sensitive to the concentration of salt solution, cation type, and reswelling time. The swelling
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kinetics of SB@PDA/PAA in distilled water could be fitted well with a pseudo-second-order kinetic model. Moreover, the SB@PDA/PAA superabsorbent composites exhibited excellent waterretention properties and achieved a high degradability of 33.5 wt % when they were soaked in a soil solution for 90 days. On the basis of these investigations, it is believed that the obtained
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SB@PDA/PAA could have potential applications in agricultural or industrial areas because of their water superabsorption and retention capacities, high reswelling capability, and costeffective and ecofriendly preparation and use. The proposed technology can also be extended to the synthesis of other natural biological resources and organic hybrid materials with similar
Received 7 January 2015 Date accepted 16 March 2015 Published online 16 March 2015 Published in print 8 April 2015
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